Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Reexamination Certificate
1999-10-08
2002-01-29
Lopez, F. Daniel (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
C416S238000, C416S16900R, C416SDIG005
Reexamination Certificate
active
06341940
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a fan, particularly a cooling fan associated with a heat-exchanger in a motor-vehicle.
More specifically, the subject of the invention is an axial fan comprising:
a substantially circular hub, the axis of which coincides with the axis of rotation of the fan, and
a plurality of blades which extend from the hub between a minimum radial distance from the axis in the vicinity of the hub and a maximum radial distance, each blade having a cross-section which has a respective angle of attack and a respective angle of curvature.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a fan of the aforementioned type which is configured in a manner such as to achieve a considerable reduction in the turbulence and in the recirculation of air in the region immediately surrounding the hub.
REFERENCES:
patent: 4358245 (1982-11-01), Gray
patent: 5244347 (1993-09-01), Gallivan et al.
patent: 5320493 (1994-06-01), Shih et al.
patent: 5577888 (1996-11-01), Capdevial et al.
patent: 5961289 (1999-10-01), Lohmann
patent: 6065937 (2000-05-01), Hunt
patent: 3028108 (1981-02-01), None
patent: 1416930 (1966-01-01), None
patent: 447035 (1936-06-01), None
Gate S.p.A.
Lopez F. Daniel
Sughrue & Mion, PLLC
Woo Richard
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